In a shop, the number of correction tapes was
14 of the total number of correction tapes and punchers together. Harry sold the correction tapes and punchers in sets of 1 correction tape and 7 punchers. After selling all the punchers, he still had 28 correction tapes left. How many punchers were in the shop at first?
| |
Correction Tapes |
Punchers |
| Before |
1x7 =
7 u |
3x7 =
21 u |
| Change |
- 1x3 =
- 3 u |
- 7x3 =
- 21 u |
| After |
28 |
0 |
Since all the punchers were sold, the number of punchers at first and the number of punchers sold were the same. Make the number of punchers at first and sold the same. LCM of 3 and 7 is 21.
Number of correction tapes sold
= 7 u - 3 u
= 4 u
4 u = 28
1 u = 28 ÷ 4 = 7
Number of punchers at first
= 21 u
= 21 x 7
= 147
Answer(s): 147
